Celestine is a mineral composed of barium sulfate, often found in sedimentary rocks. It typically forms in evaporite deposits and can appear in various colors, including colorless, white, blue, and yellow. Celestine is known for its beautiful crystal formations, which can be quite striking and are often sought after by collectors. This mineral is also significant in industrial applications, particularly in the production of barium compounds. These compounds are used in various fields, including the manufacturing of glass, ceramics, and fireworks. Additionally, celestine can be used in the oil and gas industry as a drilling fluid additive.